A safety vehicle that acts as a mobile barrier between traffic and the work area.

Works access ahead: watch for vehicles entering or leaving the work area.

Right lane closed ahead: get into the correct lane in good time.

Start of the work zone, with the type and length of the works.

Lateral shift marker: the road shifts sideways or bends sharply through the work zone.

Black symbol or text on an orange background. Diamond shapes warn; rectangles give information.

Road works ahead: slow down, stay alert and avoid overtaking.

Hazard ahead.

You must not exceed it. Also obey the orange work zone signs.

Road works ahead.

Be patient, keep clear and change lane in good time. It may be moving slowly or stopped.

Concentrate on the road ahead, not the works, and keep a safe distance from the vehicle in front.

It shows the distance to the hazard.

Get into the correct lane in good time. Do not cut past the queue or drive through coned-off areas.